US3793648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bullet-resisting armor
Assignee: Feldmuehle Anlagen und Produktion GmbH
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Filing: 1972-12-15
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Granted: 1974-02-26
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Expires: 1992-12-15
Abstract
Abstract Laminar plates having an outer layer of hard, polycrystalline, sintered ceramic backed by an aluminum alloy layer resist the passage of bullets and like projectiles as well as much heavier steel armor or heavier armor having a similar ceramic outer layer over a steel base. An intermediate rubber layer permits a reduction in the thickness of the aluminum layer and a corresponding reduction in overall weight at equal protection. Armored vests in which small laminar plates are held in pockets in overlapping relationship are a prime field of application.
Inventors
- 👤 E Dorre
- 👤 M Nussbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:35
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0414; F41H5/0421; F41H5/0492
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
39 words
A garment as set forth in claim 1, wherein said first layer has a circumferential edge portion, and said plate member further includes a metallic rim portion confining said edge portion in a direction transverse to said common direction.
Claim 2
Dependent Claim
33 words
a second layer of metal backing said first layer, the first layers of said plate members facing in a common direction outward of said garment and away from the associated second layers, and
Claim 3
Dependent Claim
13 words
a third layer of elastomeric material interposed between said first and second layers.
Claim 4
Dependent Claim
62 words
A garment as set forth in claim 1, wherein said inorganic material is polycrystalline and selected from the group consisting of aluminum oxide, chromium oxide, titanium carbide, silicon carbide, and boron carbide, the crystals of said material being integrally bonded to each other,and pores in said first layer amounting to less than ten percent of the apparent volume of said first layer.
Claim 5
Dependent Claim
86 words
A garment as set forth in claim 1, wherein said plate member further includes at least one other layer of said material spacedly juxtaposed to said first layer on said third layer, and at least one metallic rib projecting from said second layer and separating said first layer and said at least one other layer from each other, said at least one rib and said rim portion confining said first layer and said at least one other layer in all directions perpendicular to said common direction.
Claim 6
Dependent Claim
41 words
A garment as set forth in claim 2, wherein said edge portion of the first layer in each plate member is aligned in said common direction with the edge portion of the first layer in another one of said plate members.
Claim 7
Dependent Claim
65 words
A bullet-resisting, substantially planar, laminar plate member comprising: a. a backing layer of aluminum alloy; b. a Shock-absorbing layer having a hardness value of at least 8 on the Mohs scale and essentially consisting of crystalline inorganic material, said shock absorbing layer being superposed on said backing layer; and c. a stress-distributing layer of elastomeric material interposed between said backing layer and said shock-absorbing layer.
Claim 8
Dependent Claim
62 words
A plate member as set forth in claim 6, further comprising a metallic rim projecting from said backing layer and enveloping said shock-absorbing layer and said stress-distributing layer, said shock absorbing layer including a plurality of spacedly juxtaposed pieces of said inorganic material having respective edge portions, and an elongated body of metal interposed between said edge portions and separating said pieces.
Claim 9
Dependent Claim
18 words
A plate member as set forth in claim 7, wherein said elongated body essentially consists of alumin alloy.
Claim 10
Dependent Claim
21 words
A plate member as set forth in claim 6, wherein said layer of elastomeric material is not thicker than 1 millimeter.
Claim 11
Dependent Claim
28 words
A garment as set forth in claim 1, wherein said second layer essentially consists of an aluminum alloy, and said third layer is not thicker than 1 millimeter.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |